Equal. It takes two operands of the same type: numeric, string
or datetime. The result is numeric value 1 or 0, if the
two operands are equal or non-equal, respectively.
The operators = and == are shortcuts for this function.
Greater-or-equal. It takes two operands of the same type,
which can be either numeric, string or datetime.
The operator >= is a shortcut for this function.
Greater-than. It takes two operands of the same type,
which can be either numeric, string or datetime.
The operator > is a shortcut for this function.
Less-or-equal. It takes two operands of the same type,
which can be either numeric, string or datetime.
The operator <= is a shortcut for this function.
Less-than. It takes two operands of the same type,
which can be either numeric, string or datetime.
The operator < is a shortcut for this function.
Not equal. It takes two operands of the same type,
which can be either numeric, string or datetime.
The operator != and <> are shortcuts for this function.